Science

Wednesday, 10 December 2025
13 facts about tears
13 facts about tears
Multipurpose liquid
Associated with emotions, tears are a product of lacrimal glands, found in the eyes of most terrestrial vertebrates. Although their primary function i ...

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Aurora
Auroras take many shapes. They can appear in the form of colored rays, streaks, ribbons, curtains, crowns, arcs, and others.
Snow
Snowflakes fall relatively slowly, at about four kilometers per hour.
On average, heavy rainfall falls at about 20 kilometers per hour, and hail can reach much higher spe ...
Titan
The first probe near Titan was Voyager 1.
The flight took place on November 12th, 1980. Several photos were taken from a distance of 4,000 km, ...
Mushrooms
Fungi live in symbiosis with microorganisms, higher plants (Embryophyte) and animals.
With many plants, they form mycorrhiza (symbiotic association of roots or seeds of vascular plants w ...
Earth
Although it's hard to believe, the Earth's crust consists of 47 percent oxygen.
It is trapped in the soil in the form of various oxides, the most common of which are: silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, and iron oxide.
Brain
Sleep is essential for the proper functioning of the brain.
During sleep, the brain stores and systematizes information.
Fungi
Mycelium can become visible to the naked eye, for example, on various surfaces and substrates, such as damp walls, spoiled food, etc.
Mycelia, grown on solid surfaces, are called colonies. Some individual colonies can reach extraordin ...
Earth
Throughout its history, Earth has had four different atmospheres.
At first, it was surrounded by a primordial atmosphere, which consisted of the remains of proto-plan ...
Cosmos
The largest crater in the Solar System is located on the surface of Ganymede, Jupiter’s largest moon.
The crater has a diameter of 15.600 kilometers and was discovered on 7th August 2020. So far it has not been named.
Silver
Pure high-quality silver contains at least 99.9 percent of this metal.
Purity levels above 99.999 percent can also be found.